Oil pump



May 1, 192s. 1;61,728

J. B. FISHER OIL PUMP Filed Oct. 8. 1926 2 Sheets-sneer 1 May l, 1928.

- J. B. FISHER OIL PUMP Filed Oct. 8. 1926 2 Sheets-Sheet '2 PatentedMay 1, 1928.

kATENT oFlfiC:13. L

JAMEsIr, .FISHER or WAUKESII'A, WISCONSIN, essIeNoR ro WAUKESHA MOTOR'Coin- PANY, OF WAnKEsIIA, v'vIsoONsIN;Av CORPORATION 0F WISCONSIN.

OIL PUMP.

Appiicationined oefoer s; 1926.. serial Nog 140,2a/.1-`

My invention relates to oil pumps particularly useful in finternalcombustion enginesv for automotive vehicles for preventing collection ofthe loil in the forward end of the crank case when the vehicle istraveling over uneven ground and to keep it in the oil sump availablefor lubricating purposes. The object of the invention is to provide suchan arrangement in .which the pump inlet is normally above the oillevelin the crank case, and in which the pump is lubricated when normallyrunning idle by lubrieating oil fed to the end crank shaftbearing 'fromwhich the pump-isr suspended.

On the accompanying drawings, Figure 1 shows the lower part of` anengine crank case witlrthe oil pump and pis- Y and e Fig. Bis asectional view online 3 3 of Fig. 2.

Referring to"F-ig.'1, the crank case 1() has the bearing structures 1 1which journal the. crank shaft 12. At its .rear end, the crank case hasthe oil sump 13, from which oil drawn b y means of a pump, (not shown)and distributed to the crank sliafft and other bearings through a ductm. In addition to the main oil pump, I provide the auxiliary oil pump P.and I support this pump from the front crank shaft bearing.

This auxiliary pump j-has the inlet 14- which,

when the engine at `normal level, is above the level of theoil in thecrank ease, but which, when the engine is ktilted forwardly, will be inthe oil so that the pump will Apump oil Aand return itthru a pipe 15y tothe sump 13.

Referring to Figs. and 3, the body 16 of the pump has the iianges 17 bymeans of `which it secured against the under side of the front crankshaft bearing 11 by bolts 18. Journaled in this body is the shaft 19which is belowthe engine crank shaft and parallel therewith and at itsouter end carries the gear 20 which meshes with the driving gear 21 onthe outer end of the crank shaft. Atits inner end, the shaft 19 extendsinto the pump gear chamber 22 and supports the' the pump vbody.v TheOuter ends of the pump gear'chambers vare-closed by the cover v .plate27. Y

The pump gears receive 'theoil from the inlet vchamber 28` with whichVtheoil inlet yduct 14 communicates. The gears pump the oil into thechamber 29,- from y'which is ldischarged through the duct-"30 into thereturn pipe "15, the lflo-vv being indicatedby the larrows on Fig.' 2.yTo properly align' the pump relativeto the crank shaft and to get theproper meshv between the gears 20 and 21, yadjustment shims'l areinserted between lthe As before stated,thevinletv ductflt for the pumpis above the oilV levelwhen ethevehiCle j on which the engine |isinstalled is running Fig. 2 is an end view of the crank shaft bearingand the pump supported thereon;

along. 'the' ordinary grades 'Howevenl as soon as the engine y1s`inclined forwardly suiliciently to ycause thefoil'to lflow fromthe sump13 toward thev front uof the crank ease, the

' inlet ductv 14 will be in the oil and the pump v purposes.' Abafliewall 32 at the sump 'will guide the returned oil to the sump. and willyalso retard Vthe spilling over ofthev sumpy ywhen the engine lisinclined forwardly,v A

pump` base and the l'supporting bearing 11. i

Vsuitable clamp 33 will support thereturn r pipe 15 at itsinner end inposition over the sump. l i

The pumpv Pis running whileA the engine is running, and when itis'pumpingoil the pump. gearswill distributepart ofthis oil" to thevariousbearing surfaces andkeep the pump well lubricated. However, whenthe lpump is running idle, this source of lubrication will cease. Toinsure proper lubrication at all times, I provide oil ducts to thevarious bearing surfaces and connectv them to receive part of thelubricating oil supplied to the crank shaft bearings by the mainlubricating oil pump.- In the bushing 34 of the front crank shaftbearing, I 4provide the oil collecting groove 35 which receives oil fromthe duct m (Fig. l) and which communicates'with the oilv duct 36extending downwardly through the bearingsV and registering `with theduct 37 extending through the pump body to discharge into the oil-groove38 in the pump shaft 19. This. groove feeds the oil through the hole 39to the axle passageway 40 in the pump shaftl leading tothe pump gearChamber 22 and oiljthen, linde its lWay to the meshing surfacescommunicating also thru radial holes 41 With the meshing surfaces' ofthe gear 23.' The of the oompenionygeer 24,1nnd1to -the-stub shaft 26. Aduct 42 extends directly from the mein shaft bore to the boreofthe/:stub shaft. The various bearing surfaces of the pump are thusWellflubriated wh'ether theA u A felt 'Wesher43isurrounds the duot36. atthe junoture of the pumpl body and the crank shaft bearing to preventleakage of oil. TheauXiliery/pump is-l compact and seourelylsupportedunder thefront'orank shaft f pump is Working. orrunning idle.

bearing, and `When theloWer removable part for panof the crank ense isremoved, the pump parts are readily accessible upon refmoval of the@over plate27 r'Ihe pump is alwaysfrunning While theengine is 'running iand nssoon "es o ilflows tothe frontof the orankfcase to e`euiflioientkv depth, thelpump will: immediately 4piek up the oil endreturn it toth'e'oil sump so that thesump ienlWayS kept` suilioientlylled toproperly feed lthe bearing lubricating the main pump. l v u f Iclaim' as tollowsr- 1. The, oombination ofanfinternnl com-ibustionenginehnving 'a prank case and un 'foil sump "(it'the rear endthereof, n pump e'tthe front 'end of said crank oase in driv- Yfing oonneotionvvith' the engine crank shaft, kfan oil inlet fonszud pumpabove the oil I level in, the crank oase when the englne 1s runningalong vordinary,grades land commu- "nicating'wlth oiliiowing to theforward end ofthe Crank ease'when the engine Vis. tilted 2.V heCombination ofen internal oomduring ordinary tilting ofsaid engine butadnptedto communicate with oil :flowing to ythe forward part of theCrank ease during extraordinary forward tilting of the engine, andan oilreturn path Vfrom Said pump to said sump. v3. In an internal combustionengine, the combination With the engine crank shaft and a bearingtherefor, of a pump supported on said bearing and continuously drivenfrom Seid shaft, and oil ducts leadingfrom said crank shaft bearing tothe pump bearings for conveying surplus lubricating oil from Vthe crankshaft bearing to the pump bean ings. v

4. In en `internal combustionv engine, a pump at "the front end ol theengine crank onse supported from the front-crunk shaft bearing and beingconnected to lbe continuously driven from said shaft, un oil inlet forthe pump normally out of communicationwlth oil 1n Suid crunk CaSe but inColn- Amunieation therewith when oil spills from4 .the 'rear .end to thefront vendwoli the crank case during-tilting ofthe engine, n returnpipefroln the pump to the rear end of the Crank cane, und oil duets` inSuid crank shaft u bearing and pump for 'conducting surplus lubri'euting4oil from Aseid Crunk shaft bearing to the pump bearings.

' 5. In an internal combustion engine, the combination of un oil pumpsupported on the front crunk shaft bearing und eontinuously driven bythe crnk'sheft when the engine is operating, un inlet Afor the pumpreeeiving'oil only when oil flows to the front of the crunk case duringtilting ofthe engine,

vthe pump parts beingflubricated byl the pumped oil during Working ofthe pump,

and means for conducting surplus lubricat-l ing oil from said crankshaft bearing to the pump partev to lubrioate the pump parts when thepump is not Working. y

In Witness whereof', I` hereunto'subseribe my numeri-.his 29 dayoSeptember, 1926.

l Y v Y JAMES B. FISHER.

